Ion acoustic solitons/double layers in two-ion plasma revisited

Ion acoustic solitons and double layers are studied in a collisionless plasma consisting of cold heavier ion species, a warm lighter ion species, and hot electrons having Boltzmann distributions by Sagdeev pseudo-potential technique. In contrast to the previous results, no double layers and super-so...

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Bibliographic Details
Published in:Physics of plasmas 2014-06, Vol.21 (6)
Main Authors: Lakhina, G. S., Singh, S. V., Kakad, A. P.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Acoustic properties
Acoustics
COLLISIONLESS PLASMA
Collisionless plasmas
Density
Dust
DUSTS
Dusty plasmas
Electrons
HEAVY IONS
Hot electrons
MACH NUMBER
MASS
Plasma physics
POTENTIALS
Solitary waves
SOLITONS
TEMPERATURE DEPENDENCE
Temperature effects
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Summary:Ion acoustic solitons and double layers are studied in a collisionless plasma consisting of cold heavier ion species, a warm lighter ion species, and hot electrons having Boltzmann distributions by Sagdeev pseudo-potential technique. In contrast to the previous results, no double layers and super-solitons are found when both the heavy and lighter ion species are treated as cold. Only the positive potential solitons are found in this case. When the thermal effects of the lighter ion species are included, in addition to the usual ion-acoustic solitons occurring at M > 1 (where the Mach number, M, is defined as the ratio of the speed of the solitary wave and the ion-acoustic speed considering temperature of hot electrons and mass of the heavier ion species), slow ion-acoustic solitons/double layers are found to occur at low Mach number (M 
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4884791